In order to readily switch over between SSPs (i.e., Storage Service Providers) that undertake the operation/management of storage apparatuses, in an information processing system including a computer and the storage apparatuses, an operating/managing system provided among the computer and the storage apparatuses includes the following units: A connection destination switching unit and an information duplicating unit for implementing the migration between the SSPs without interrupting the accesses to the storage apparatuses from the computer, and a request property selecting unit, a property comparing unit, and a comparison result indicating unit for assisting the selection of a purpose-fitting SSP from among the plurality of SSPs.